I created this workaround Gantt Chart View. It is actually a table with columns Aug,Sep until Jun next year as virtual columns. Each VCs has a related formula. For example, for September, currently I am using the following formula:
if(And([Start Date Booked]<“02/Sep/2020”,[End Date Booked]>“1/Sep/2020”),“Worker master Current_Images/1.Picture.094659.png”,"")
1.Picture.094659.png gives the blue bar
Please set to column type to ‘thumbnail’. Image type did not work when I tried.